Rollup merge of #97266 - est31:unknown_lints_cfg_attr, r=lcnr

Make weird name lints trigger behind cfg_attr

The weird name lints (`unknown_lints`, `renamed_and_removed_lints`), the lints that lint the linting, were previously not firing for lint level declarations behind `cfg_attr`, as they were only running before expansion.

Now, this will give a `unknown_lints` warning:

```Rust
#[cfg_attr(all(), allow(this_lint_does_not_exist))]
fn foo() {}
```

Lint level declarations behind a `cfg_attr` whose condition is not applying are still ignored. So this still won't give a warning:

```Rust
#[cfg_attr(any(), allow(this_lint_does_not_exist))]
fn foo() {}
```

Furthermore, this PR also makes the weird name lints respect level delcarations for *them* that were hidden by `cfg_attr`, making them consistent to other lints. So this will now not issue a warning:

```Rust
#[cfg_attr(all(), allow(unknown_lints))]
mod foo {
    #[allow(does_not_exist)]
    fn foo() {
    }
}
```

Fixes #97094

0 files changed, 0 insertions, 0 deletions